ACL2-PC::UNSAVE

Eliminates the association of a proof-checker state with name, if
name is supplied and not nil. The name may be nil or not supplied,
in which case it defaults to the event name supplied with the
original call to verify (if there is one -- otherwise, the
instruction ``fails'' and there is no change). The ACL2 function
unsave may also be executed outside the interactive loop, with the
same syntax.